3369985666991 has 2 divisors, whose sum is σ = 3369985666992. Its totient is φ = 3369985666990.

The previous prime is 3369985666951. The next prime is 3369985667003. The reversal of 3369985666991 is 1996665899633.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3369985666991 - 2¹⁴ = 3369985650607 is a prime.

It is a super-2 number, since 2×3369985666991² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3369985666951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1684992833495 + 1684992833496.

It is an arithmetic number, because the mean of its divisors is an integer number (1684992833496).

Almost surely, 2^{3369985666991} is an apocalyptic number.

3369985666991 is a deficient number, since it is larger than the sum of its proper divisors (1).

3369985666991 is an equidigital number, since it uses as much as digits as its factorization.

3369985666991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3061100160, while the sum is 80.

The spelling of 3369985666991 in words is "three trillion, three hundred sixty-nine billion, nine hundred eighty-five million, six hundred sixty-six thousand, nine hundred ninety-one".